I'm hoping the governor of Virginia, who supposedly did black face at a party in 1980, can be forgiven. A friend of mine, who is a gay rights activist, pointed out that in 1980, he (this friend) was in a Pentecostal church trying to pray the gay away. Since then, my friend came out of the closet.
People do evolve. In Virginia, it looks like the 2 other Democrats, that could be in line for governor, are also tainted. 3rd in line is a Republican. Of course maybe being a Republican isn't necessarily an automatic indictment; if one supports Republican ideals.
One virtue in society is compassion. Zero tolerance can go too far. Given how much worry there is about global warming, it is conceivable that at some future time, politicians who had a history of flying in jet planes or driving automobiles, while fully knowing those effects on the planet, could be seen as tainted and ask to resign.